Water-tube boiler.



Patented Apr.`22, |902.' l E. G. RUST. wATl-: TusEBoILEn'.

(Appuevltion med N ov. 14 1901.)

* 2 Sheets-Sheet VI.

m: Nonms PETERS cov. nnarxumo'., WASHINGTON. D. cv

'Illu Modal.) I

Patented Apr. 22, 1902.

(Applietion med Nov. 14, 1901.;

M or..

UNITED STATES y PATENT OEEIOE.

' EDWIN GRAY RUST, OE PUEBLO, COLORADO.

WATER-TUBE B'OILER.

SPECIFICATION forniing pari; 0f LetterSPatent No. 698,323, dated April22, 1902.

Application led November 14, 1901. Serial No. 82,211. (No model.) v I Toa/ZZ whom it nfl/wy concern:

Beit known that I, EDWIN GRAY RUsT,a citizen of the UnitedStates,'residing in Pueblo,

VColorado, have invented certain Improvements in W ater-Tube Boilers, ofwhich the followingis a specification'.

My invention relates to certain improvements in steam-boilers having forits object through the drums and furnace of my improved boiler; and Fig.2 is a vertical sectional .view taken on the line 2 2, Fig. 1.

In the above drawings, A is the boiler set- I ting or casing, usually ofbrick, and supported 1n the present instance on concrete foun dationsa.. This casing projects in front of the boiler proper to form thefurnace B, this latter, together with the whole interior surface of thecasing, being provided with a refractory lining a. The grate isrepresented at b, and at its inner end is the bridge-Wall b.

Carried on any suitable framework around which the casing or setting isbuilt are two drums C, and above these, at the top of the casing, aretwo Others C' of similar construction, while Water-tubes c, preferablyall of the same length, extend between and connect the two pairs Ofdrums, respectively.;

The tube-sheets of these drums are preferably of the construction setforth in my application for patent- No. 81,420, tiled November 7, 1901,each sheetbeing pressed out, so as to form a number of plane surfacesc2, into each of which enter a series of the tubes o,

' each series consisting of four in the present are two setsofsteam-pipes c5, connecting said upper drums. Upon awall of suitablerel fractory material vextending between and a smaller drum D, whiledirectly above this latter'is'a drum D', carried by the frame- C. Thetube-sheets ,of these smaller drums drums C and C', and they, like thelarger of vertical tubes d. Each of the above Aseries consists of twotubesspaced in the present instance about three inches apart, the spaceso formed beingl filled witha refracthe boiler-casing andl from the drumD to the drum D.

of tubes CZ to the drum C farthest fromthe furnace B, while two seriesof tubes cl2 and d3 extend from rthe upper portion of the drum Dl toboth of the'drums C', the tubes of each series alternating with eachother. These Vtwo drums D and D', with the refractory partition Ebetween them, serve as a baflie-wa'll to direct the products ofcombustion from the furnace, so as to secure most efficient action,

on hollow girders and channels e and e', re# speotively,` extendingdownwardly vfrom the top ofthe boiler-casing just back of the rear drumC and its tubes. The connection F to the stack is made between thislatter drum and the' rear wall ofthe casing.

water-column g, and, besides the fire and ash doors a3 and a4, therearea number of doors In operation'the hot gases from the furnace passout'between the first set of tubes c, and after striking theftubes dk onthe front face of the baffle-wall E rise through the space between saidwall and the-front of the casing A, finally striking the bottoms of theupper vdrums C and passing between theftubes d2 and d3. From here thegases are directed down around the rear set of tubesc, between andaround the drum D', with its back s'et of tubes d and the rearbaffle-wall E'. Passing back between the rearset of tubes c, theysomewhat above the two drums C is mounted` work of the boiler at a levelbelow the drums are of a construction similar to that of the pairs ofdrn ms, also are connected by a series tory wall or partition E, whichextends across 'The lower drum D is connectedby a series l a5 inthebrick casing provided for thepurpose of facilitating inspection andcleaning. y

there being a second baffle-'wall E', carried The boiler is providedwith the customaryl i IOO iinally rise between the wall E and the backwall of the casing to the stack F. Such a course of the products ofcombustion will give rise to a circulation of water in the boiler, asindicated by the arrows. Thus from Fig. l it will be seen that the waterwill rise through the front set of tubes c, and after entering the firstdrum C will pass through to the tubes Z2 into the drum D and downthrough the tubes CZ into the drum D. From here it flows through thetubes d into the rear drum C and rises through the rear tubes c to therear drum C.

It will be noted that by the construction shown I am enabled toeffectively utilize the space for heating-surface in which it wasformerly customary to place a baille-wall, at the same time employingthe tubes in said space to support a relatively thin and lightpartition. In this manner I very materially increase the availableheating-surface of the boiler withoutoccupying any more space than isordinarily taken by a boiler of m uch smaller capacity. By the use ofthe peculiar construction of tube-sheets I am enabled to use straighttubes all of the same length between each pair of drums, by this meansreducing the cost of manufacture and making it possi* ble to easily andquickly remove and replace any one of the tubes.

I claim as my inventionl. The combination in a water-tube boiler, of twopairs of main drums having watertubes extendingr between them, with athird pair of drums smaller in diameter than the main drums and placedparallel to them, said smaller drums also having tubes whereby they areconnected and being above the lower and below the upper of said maindrums, substantially as described. l

2. The combination in a water-tube boiler of upper and lower maindrumshaving tubes extending between them, with an auxiliary set of drumslying parallel to the main drums and also having tubes extending betweenthem, said auxiliary setof drums being above the lower and below theupper of the' main drums, substantially as described.

3. The combination in a water-tube boiler, of upper and lower main drumshaving tubes extending between them, with an auxiliary set of drums alsohaving tubes connecting them and placed above the lower and below theupper of the main drums, said auxiliary set of drums being parallel withand connected to the main drums and of less capacity than the same,substantially as described.

4. In a water-tube boiler, the combination of two pairs of main drums,substantially vertical tubes connecting the members of each pair, a pairof auxiliary drums below the upper main drums and above the lower maindrums, said auxiliary drums being parallel to said main drums andalsohavingsubstantially vertical tubes connecting them together, with abaille-wall supported by the lower of said auxiliary drums,substantially as described.

5. In a water-tube boiler, the combination of two pairs of main drums,water-tubes connecting the members of each pair, a pair of auxiliarydrums between said pairs of main drums, and also having water-tubesconnecting them, said auxiliary drums being above the lower and belowthe upper of the main drums, and a battle-wall supported by the lowerauxiliary drum and extending between the tubes thereof to the upperauxiliary drum, substantially as described.

6. In a water-tube boiler, the combination of two pairs of main drums,water-tubes connecting the members of each pair, a pair ot' auxiliarydrums between said pairs of main drums also having water-tubesconnectiner them, said auxiliary drums being above the` lower and belowthe upper of the main drums and parallel to the same, and a baffle-wallsupported by the lower auxiliary drum and extending between the tubesthereof to the upper auxiliary drum, said auxiliary drums being of adiameter less than the main drums and being connected thereto,substantially as described.

7. In a water-tube boiler the combination of two pairs of main drums, aseries of watertubes of equal length connecting the members of eachpair, auxiliary drums parallel to and between said main drums, alsohaving tubes ot' equal length connecting them, tubes connecting thelower of the auxiliary drums with the lower main drums, and tubesconnecting the Lipper auxiliary drum with the I upper main drums,substantially as described.

S. In a water-tube boiler, the combination ,of a furnace, upper andlower main drums having water-tubes connecting them, auxiliary drums ofsmaller volume between said main drums and also having tubes connectingthem, with means for causing'the hot gases from the furnace to riseverticallyaround the tubes of the front pair of main drums and afterpassing between the upper main drums and the upper auxiliary drums, toflow down between the tubes connecting the rear main drums and the tubesconnecting the auxiliary drums, said means finally causing the gases topass over the lower rear main drinn and to enter a conduit connected tothe stack, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ED TIN GRAY RUST.

lVitn esses:

AXEL H. HELANDER, JAMES F. CHAPMAN.

IOO

